Landing: 7e784194fe49

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Project / Subsystem

gcc / gcc

Date

2026-08-20

Author

Jakub Jelinek

Commit

7e784194fe49e45c8fb78168064a9b2627493f09

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: gcc
patch_id: —
commit_hash: 7e784194fe49e45c8fb78168064a9b2627493f09
source_type: github
headline: Fix -fvar-tracking-uninit option interactions
tldr: Corrected the behavior of -fvar-tracking-uninit to properly imply -fvar-tracking, resolving issues with uninitialized variable tracking.
author: Jakub Jelinek
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • gcc
• debugging
• compiler-options
• bugfix
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/7e784194fe49e45c8fb78168064a9b2627493f09
date: 2026-08-20T00:00:00.000Z

A recent change that removed AUTODETECT_VALUE broke the interaction of the -fvar-tracking-uninit option. Previously, -fvar-tracking-uninit explicitly implied -fvar-tracking, and the option defaulted to enabled for optimization levels of 1 and above. The change restored the implication that -fvar-tracking-uninit enables -fvar-tracking, ensuring correct behavior for tracking uninitialized variables. It also re-establishes default behaviors that were inadvertently lost.